Flask.



H. S. COOPER.

FLASK.

APPLICATION FILED DEC-22.1915.

Patented May 1, 1917.

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FLASK.

APPLICATION FILED DEC-22. 19I6I Patented May 1-, 1917.

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HARRY S. COOPER, OF ERIE, PENNSYLVANIA, ASSIGNOR T0 GRISWOLD MANUFACTUR- ING- OOMPANY, OF ERIE, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

FLASK.

Specification of Letters Patent.

Patented May 1, 1917.

Application filed. December 22, 1916. Serial No. 138,311.

To all whom it may concern:

Be it known that I, HARRY S. COOPER, a citizen of the United States, residing at Erie, in the county of Erie and State of Pennsylvania, have invented new and useful Improvements in Flasks, of which the following is a specification.

This invention relates to flasks and consists in certain improvements in the construction thereof as will be hereinafter fully described and pointed out in the claims.

One of the difliculties in molding is to have the separable elements of the flask so guided that the parts of the mold, in its final form, exactly register. The parts of the flask are subjected to rather rough usage and the guiding members must be made sufficiently loose to permit of the parts being ready to be put together and taken apart. The slack or looseness of these guiding members if all in one direction when the mold is formed and all in opposite directions when the molds are put together so as to cumulate any error due to this slackness will produce quite defective molds and consequently quite defective castings. The object of the present invention is'to so form the guiding means as to effect a perfect registering of the molds and at the same time to permit of the easy assembling and separation of the flask members.

The invention is illustrated in the accompanying drawings as follows Figure 1 shows a plan view of the flask. Fig. 2 a section on the line 22 in Fig. 1. Fig. 3 a section on the line 3-3 in Fig. 2. Fig. 4 a central section of one of the guiding means similar to the part shown in Fig. 2 with a match plate between the flask boxes. Fig. 5 a plan view of a flask as used in a molding machine.

Fig. 6 a section on the line 66 in Fig. 5. Fig. 7 a plan view of the companion flask of that shown in Fig. 5.

Fig. 8 a section on the line 8-8 in Fig. 7 Fig. 9 a section on the line 99 in Fig. 8. 1 marks one of the flask boxes and 2 the opposing flask box. These are commonly referred to as the cope and drag. The box 1 has a bracket 3 and the box 2 a corresponding bracket 4. The bracket 3 has a perforation 5. A pin 6 has an extension extending through a perforation 7 in the bracket or ear 4. A nut 8 secures the pin 6 in place. The guiding means is one of common construction. Ordinarily there must be some play between the pin 6 and the opening 5 so as to permit of slight irregularities and springing of the flask parts or elements. At the same time nice registering of the molds demands as close a fit as is practical.

At the opposite side of the flask parts a bracket 9 is secured to the flask member 1. This has a groove 10 in which is arranged a yielding guide plate 11. The guide plate 11 has a slot 12 through which the bolt 13 extends, holding the guide plate in place. A shoulder 14 is arranged at the outer end of the bracket 9 and springs 14 are arranged between the shoulder 14" and the plate 11.

The plate 11 has a notched end 15, the

sides of the notch being at an angle to each other. A triangular shaped pin 16 is secured to the flask part 2 and slides into the notch 15 as the flask parts are assembled. The, face of the pin 16 corresponds in shape to the notch 15 so that the pin not only guides the flask parts longitudinally but also tends to center them and thus lock them laterally.

It will readily be seen that as the pin 16 enters the notch 15, thus forcing outwardly the plate 11 slightly against the spring 14, that whatever play there is between the opening 5 and the pin 6 is taken up, that is to say, the part 1 is moved to the right so as to bring the outer edge of the opening 5 into contact with the outer face of the pin 6. The mold being formed with the parts in this relation and the flask separated for the removal of the patterns, it is obvious that when the mold parts are again assembled the yielding pressure. of the plate 11 on the pin 16 will bring the outer side of the opening 5 into contact with the outer face of the pin 6, in other words, the slack or play between the parts will be taken up in both instances in the same direction so that while the parts may be readily separated and assembled by reason of the yielding guiding means there will be an accurate registering of the molds.

It is some times desirable to utilize a match plate in connection with the flask. Such a match plate 17 is shown in Figs. 6 and 4. The match plate is provided with the perforation 18 through which the pin 6 extends. The match plate preferably has a yielding guiding means which has been supplied for the flask. For this purpose,

it has a plate 19 in which there is a longitudinal guiding pocket 19. A yielding guide plate 20 is arranged in the pocket 19*. It has an opening 21 into which a projection 22 extends, the projection 22 forming a stop for the guide plate 20. The guide plate is forced inwardly or toward the flask by means of the springs 23. The inner face of the guide plate has a notch 24; and this notch operates in connection with the pin 16 and in the same manner as does the plate 11 on the flask. Here it will be seen that this pressure moves the match plate toward the right, as shown in Fig. 6, taking up any slack there may be between the pin 6 and the perforation 18. I prefer to make the face of the notch 24 as wide as practical and for that reason have an upward extension 26 on the plate 20, this extension extending through a perforation 25 in the match plate through which the pin 16 extends.

It is desirable often to use one part of the flask at a time. This is especially true with a molding machine and to form parts of the patterns on separate match plates. Here a nice registering of the parts is desirable and in Figs. 5 to 9 such a structure is shown. In Fig. 8 a match plate 17 forming a companion mold for that formed by the match plate shown in Fig. 6 is provided with the triangular-shaped pin 27. The pin 27 is carried by the slide 28 arranged in the pocket plate 29. The pocket plate 29 has the guide pocket 30 and the plate 28 an opening 31 into which a projection 32 extends. Springs 33 are arranged between the projection 32 and the end 34 of the plate 28. As shown the flask box and match plate in Fig. 8 both have the yielding guides.

One of these may be dispensed with under certain conditions.

What I claim as new is 1. In a flask, the combination of separable elements; a fixed guiding means between said elements at one side of said elements; and a spring actuated guiding means between the elements at the opposite side of said elements.

2. In a flask, the combination of separable elements comprising a flask box and a match plate; a fixed guiding means between said elements at one side of said elements; and a spring actuated guiding means between said elements at the opposite side of said elements.

3. In a flask, the combination of separable elements comprising two flask boxes; a fixed guiding means between said boxes at one side thereof; and a spring actuated guiding means between the boxes at the opposite side thereof.

4. In a flask, the combination of separable elements; a fixed guiding means between the elements at one side of said elements; and a spring actuated guiding and centering means between said elements at the opposite side of said elements.

5. A- flesk element having a fixed guiding means at one side thereof and a spring actuated guiding means at the opposite side thereof, the spring actuated guiding means comprising an inclosing guide pocket plate; a guide slidinglymounted in the pocket; andda spring on the pocket acting on the gu1 e.

In testimony whereof I have hereunto set my hand.

HARRY S. COOPER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0. 

